Maryland v. Shatzer, US Supreme Court, February 24, 2010 [holding that the Edwards v. Arizona prohibition against interrogation of a suspect who has invoked the Fifth Amendment right to counsel does not require suppression of statements if, after the suspect asks for counsel, there is a break of more than two years before resuming interrogation].
Reported in JURIST's Paper Chase here. Latest commentary available here. JURIST has more on Fifth Amendment protections.